Description
Return net insulation area after openings and exclusions.
Building quantity takeoffs depend on inclusion/exclusion rules, repeated modules, joint placement and material thickness. Net area and ideal layer resistance are limited model quantities; actual fit, heat/moisture behavior and construction performance require the full assembly and measured material properties.
Return net insulation area after openings and exclusions.
When to use this tool
Use Cavity Wall Insulation Net Area when checking the stated material, layer, module or takeoff convention.
How to use the tool and how it works
- Enter wallArea, openings, excludedArea. Use the units and conventions below.
- Run the tool. Correct any format, range, or cross-field input error before interpreting the output.
- Read netArea. Use the output convention below.
Return net insulation area after openings and exclusions. Require nonnegative areas with opening sum+excluded <= wallArea; netArea = wall-sum(openings)-excluded.1
| Input field | Meaning and units | Accepted input |
|---|---|---|
| wallArea | Wall Area | Required. Finite number; minimum 0. |
| openings | Openings | Required. Array of finite number; maximum items 256. |
| excludedArea | Excluded Area | Required. Finite number; minimum 0. |
| Output field | Interpretation | Returned shape |
|---|---|---|
| netArea | Net Area | Required. Finite number. |
{
"input": {
"wallArea": 100,
"openings": [
12,
8
],
"excludedArea": 5
},
"output": {
"netArea": 75
}
}Limitations and assumptions
- Areas must avoid duplicate exclusions; no insulation continuity, thermal bridging, fire safety or installation suitability is assessed.
- Inputs must satisfy both the field types and the cross-field conditions above. Invalid input causes an error; a successful false flag or documented placeholder is a different result.
- Numeric calculations use binary floating point unless exact decimal-integer arithmetic is explicitly stated. No hidden measurement tolerance or decimal rounding is added; nonfinite or out-of-contract results are rejected. Numeric signed-zero results are exported as zero.
Alternative or Complementary methods
Use complete drawings, specifications and suitable assembly/material analysis for actual procurement, hygrothermal performance or construction.
References
Similar or alternative tools
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